Add a diagram of the compiler phases.

1 files changed, 5 insertions, 1 deletions

diff --git a/README.md b/README.md
index f10efc5..653c43b 100644
--- a/README.md
+++ b/README.md
@@ -25,7 +25,11 @@ The cute scheme compiler (like most compilers) consists of a number of
 phases that gradually transform a program from scheme code through
 numerous intermediate representations. The csc compiler has 3 such
 intermediate representations, not counting bytecode itself. These two
-languages are creatively called IR1, IR2, and IR3.
+languages are creatively called IR1, IR2, and IR3. Fig. 1 shows the
+phases of code generation.
+
+![Code generation goes through several intermediate phases, named IR1,
+IR2, and IR3.](design.svg)
 
 ### IR1